// Problem: 
// Contest: 
// URL: 
// Memory Limit: 
// Time Limit: 
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ui unsigned int
inline int read(){
	int s=0,w=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')w=-1;ch=getchar();}
	while(ch>='0'&&ch<='9') s=s*10+ch-'0',ch=getchar();
	return s*w;
}
signed main()
{
	int t=1;
	cin>>t;
	while(t--)
	{
		int n,m,q;
		cin>>n>>m>>q;
		//ui MOD=pow(2,64);
		vector<vector<ui>> v(n+1,vector<ui>(m+1));
		auto w=v;
		ui ans=0;
		for(int i=1;i<=n;i++)
		{
			for(int j=1;j<=m;j++)
			{
				cin>>v[i][j];
				w[i][j]=w[i-1][j]+w[i][j-1]-w[i-1][j-1]+v[i][j];
			}
		} 
		while(q--)
		{
			int u,v,x,y;
			cin>>u>>v>>x>>y;
			ans^=w[x][y]-w[u-1][y]-w[x][v-1]+w[u-1][v-1];
		}
		cout<<ans<<endl;
	}
	return 0;
}
